Non 12 Step rehab is the only program that has shown almost 90% no relapse rate for the past decades since its use was first promoted nationally. You may still find a drug rehab center that uses he 12 step method but normally they are restricted to local single sponsored programs in many times run by religious groups and churches as part of community charity.
The religious tie in to the 12 step program is what feeds their reliance on it and makes it a moral decision to use it not a scientific one. Long term drug rehab is almost a contradiction to the 12 step program since it teaches that once an alcoholic, always and alcoholic. Without total detoxification before intense therapy, that saying could be true for many.
However with a total body detoxification, maintenance of medical oversight for the patients total health after detox and the separate psychological therapy, relapse simply do not happen. This assumption is derived at by statistics so it not an assumption.
After more than a decade of great results with the non 12 step rehab program it has become a sure thing. Most all professional, regional drug rehab center have incorporated the 12 step program as the professional standard for treating all but the least severe cases of alcohol dependence and abuse.